Technical LJ question

Everybody is posting thoughtful year end meditations, but all I've got is a technical question: why does LJ now look different at home than at work? This has been going on for a couple of weeks. On my work computer it looks normal. On my home computer it looks terrible, with all the text left-aligned on the left edge of the window. What sin have I committed?

Here's what it looks like (click to enlarge):